South China Sea d18O and Mg/Ca Data and SST Reconstruction Oppo, D.W.; Sun, Y. Oppo, D.W. Sun, Y. Sea Surface Temperature Reconstruction earth science/paleoclimate/paleoceanography (delta 18O,Cibicidoides wuellerstorfi,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Globigerinoides ruber,null,dimensionless,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (ODP1145>LATITUDE 19.58>LONGITUDE 117.63) Magnesium/calcium (Mg/Ca) ratios of foraminiferal shells from a sediment core from the northern South China Sea, a semi-enclosed basin in the western tropical Pacific, document variations in sea-surface temperature (SST) during the past 145 k.y. Glacial SSTs were 4 °C colder than interglacial SSTs. During the last deglaciation, most of the warming was accomplished in a single abrupt step after continental ice-sheet decay had already begun, but warming and ice-sheet demise were nearly synchronous during the penultimate deglaciation. Abrupt SST changes of the past 15 k.y. were apparently synchronous with events in East Asian monsoon rainfall, suggesting that variations in monsoon winds and their influence on surface circulation of the western Pacific exerted a strong control on northern South China Sea SSTs. We suggest that this link persisted for the previous 130 k.y., during which time orbital-scale 2-3 °C SST changes and several small (2 °C) abrupt SST events occurred in the northern South China Sea. The similar timing of northern South China Sea SST, on a benthic d18O time scale, to a well-dated speleothem record from eastern China suggests that the demise of ice sheets associated with the penultimate deglaciation did not precede Northern Hemisphere summer insolation increase. Our results suggest that surface waters had higher d18O values during times of strong summer monsoon than during times of weak monsoon, likely reflecting a redistribution of 18O-depleted rainfall from land during times of strong summer monsoons, to the western Pacific during times of weaker summer monsoons. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Oppo, D.W. Investigator : Sun, Y. 2005-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2640 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2005 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1145-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2005 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1145-tab.txt English https://www.ncdc.noaa.gov/paleo/study/2640 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/oppo2005 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/odp1145-tab.txt Oppo, D.W. and Y. Sun. 2005. Amplitude and timing of sea-surface temperature change in the northern South China Sea: Dynamic link to the East Asian monsoon. Geology, Vol. 33(10), pp. 785-788. START YEAR: 142570 cal yr BP * END YEAR: 1940 cal yr BP 117.63 19.58 117.63 19.58